US4374552A - Pivoted lever caliper brake - Google Patents

Pivoted lever caliper brake Download PDF

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Publication number
US4374552A
US4374552A US06/252,288 US25228881A US4374552A US 4374552 A US4374552 A US 4374552A US 25228881 A US25228881 A US 25228881A US 4374552 A US4374552 A US 4374552A
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US
United States
Prior art keywords
arms
brake
pole
boss
arm
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/252,288
Inventor
Leonid Dayen
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Nexen Group Inc
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Horton Manufacturing Co Inc
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Priority to US06/252,288 priority Critical patent/US4374552A/en
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Publication of US4374552A publication Critical patent/US4374552A/en
Assigned to HORTON HOLDING, INC. reassignment HORTON HOLDING, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 8/24/90 - MN Assignors: HORTON MANUFACTURING CO., INC., A MN CORP.
Assigned to HORTON MANUFACTURING CO., INC., 1170 15TH AVENUE SOUTHEAST, MINNEAPOLIS, MN 55414 A CORP OF MN reassignment HORTON MANUFACTURING CO., INC., 1170 15TH AVENUE SOUTHEAST, MINNEAPOLIS, MN 55414 A CORP OF MN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HORTON HOLDING, INC., A CORP OF MN
Assigned to NEXEN GROUP, INC. reassignment NEXEN GROUP, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HORTON MANUFACTURING CO., INC.
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/2245Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes

Definitions

  • the invention relates to an improvement in what is commonly known in the trade as a caliper brake.
  • Known caliper brakes includes linkages of one sort or another which have disadvantages of construction effectiveness and maintenance.
  • the air bladder being of resilient material has intrisic return properties which returns the brake shoes to a separated condition.
  • the construction allows easy replacement and interchange of brake shoes.
  • the arc length of the shoe with each end formed on a radius provides additional shoe area radially outwardly which keeps up with the greater speed of travel at greater diameters of a disc to be braked.
  • FIG. 1 is a perspective view of a caliper brake embodying the invention with a disc to be braked shown in phantom-outline.
  • FIG. 2 is a perspective view of the arms of the brake shown as removed therefrom.
  • FIG. 3 is a sectional view on the line 3--3 of FIG. 1.
  • FIG. 4 is a sectional view on the line 4--4 of FIG. 1.
  • FIG. 5 is a sectional view on the line 5--5 of FIG. 3.
  • FIG. 6 is a view on the line 6--6 of FIG. 3.
  • the caliper brake A includes the base 10 having a boss 11 which has the hole 12 formed therein and in which the lower portion of the single pole 14 is press fit into the hole 12. Further provided is a first pivoting brake arm 16 which includes the flat portion 18 on the inner end of which is formed the end boss 20 having the hole 22 formed therethrough. The flat portion 18 has a side boss 24 formed thereon and through which is formed the hole 26 the axis of which is parallel to the axis of the hole 22. The outer end of the arm 18 is formed with the holes 25 and 27.
  • the numeral 28 designates a second pivoting brake arm that is identical to the first arm identical parts of which bear identical reference numerals accompanied by a lower-case letter a.
  • the first arm 16 is pivotally mounted on the pole 14 with the pole extended through the friction bearing 29 mounted in the hole 26 and the arm bottoming out on the lower spacer-ring 30 positioned on top of the base boss 11.
  • Mounted on the pole 14 on top of the boss 24 is the upper spacer ring 32, and mounted upon the pole 14 and upon the ring 32 is the boss 24a of the second pivoting arm 28. With the arms pivotally mounted in such a juxtaposed positions the same may be pivoted to and from the other as will be further described hereinafter.
  • the numeral 34 designates a first brake shoe including the plate portion 36 from which extends a pair of spaced flanges 38 and 40 each having a hole 41 formed therethrough which receive the pin 42. Secured to the plate portion 36 is the friction facing 44.
  • the flange 38 is strengthened by the spaced webs 46 and 48 formed integral with the flange 38 and plate portion 36.
  • the flange 40 is strengthened by a pair of spaced flanges 50.
  • the shoe 34 is pivotally mounted on the boss 20 of the arm 16 by positioning the pin 42 through the holes 41 of flanges 38 and 40 and through the bearings 54 and 56 in the hole 22 of the boss 20.
  • a second brake shoe 58 which is identical to shoe 34 but mounted as a left with respect to shoe 34 as a right, the identical portions bearing identical reference numerals but accompanied by a lower case letter a.
  • Each of the pins 42 and 42a has a ring 59 connected to the top end thereof for easy insertion and removal of the pin for maintenance of the brake shoes.
  • the arm 28 is pivotally secured upon the arm 16 by means of the lock ring 60.
  • Each of the shoe plate portions 36 and 36a is arcuately formed to a radius on both inner and outer edges 62 and 64, respectively, with the ends 61 and 63 on a radius. It has been found that with the increase of arc length and area of a shoe travel there is an increase of wear due to the greater velocity at the outer extremity and that with the increase of arc in the friction linings, which coincide with the shoes, the wear throughout the lining faces is substantially even with the instant invention.
  • the numeral 66 designates a conventional air bladder mounted between the ends of the arms 16 and 28 on each side by means of a pair of bolts 68 and 70.
  • the bladder is connected to an air supply line 72 which is used to expand the bladder which brings the shoes closer together while the intrinsic resilience of the bladder returns the arms together and the shoes apart.
  • central stop pin 74 anchored in and extending upwardly from the base 10 and centrally between the arms 16 and 28 and against which the guide pins 76 and 78 are adjustably positioned.
  • the pin 76 is threadedly mounted in the arm 16 with the lock nut 80 whereby the pin 76 may be caused to extend more or less inwardly of the arm 16.
  • the pin 78 is similarly and threadedly mounted in the arm 28 with the lock nut 82 whereby the pin 78 may be caused to extend more or less inwardly of the arm 28.

Abstract

A caliper brake including a base having a single pole extending therefrom with a pair of identically formed opposed arms pivotally mounted on the pole. On one end of each of the arms is pivotally mounted a brake shoe, and the other ends of the arms have an air bladder interposed therebetween for moving the brake shoes together. Each of the arms carries an adjustable pin engageable with a central stop pin mounted on the base and extending centrally between the arms for orienting the arms relative to a disc positioned between the shoes for braking of the disc. An air bladder is mounted between the other ends of the arms for pivoting the arms and moving the brake shoes together, the bladder having an intrinsic spring return properties which separate the brake shoes when the air bladder is deactivated.

Description

CROSS REFERENCE
This is a continuation of application Ser. No. 06/053,413, filed June 29, 1979 now abandoned.
SUMMARY
The invention relates to an improvement in what is commonly known in the trade as a caliper brake. Known caliper brakes includes linkages of one sort or another which have disadvantages of construction effectiveness and maintenance.
It is an object of the invention to provide a caliper brake having a single pole on which a pair of brake arms are pivotally mounted. On one end of each arm is pivotally mounted a brake shoe in opposed relation and between the other ends of the arms is mounted an air bladder which when expanded moves the shoes together for braking a disc associated with a machine for braking, the disc interposed between the shoes. The air bladder being of resilient material has intrisic return properties which returns the brake shoes to a separated condition.
It is a further object of the invention to provide a caliper brake which has a minimum of parts and which has a deep throat construction that allows the brake shoes to be placed e.g. inwardly of a row of teeth of a circle saw or sprocket. The construction allows easy replacement and interchange of brake shoes.
It is a further object of the invention to provide a caliper brake in which the pivoted brake arms are identical which reduces the cost of manufacture and inventor classification. It is also an object of the invention to provide a caliper brake having a pin on each arm for simply and effectively orienting the brake shoes relative to the disc member to be braked.
It is a still further object of the invention to provide brake shoes each having arcuate inner and outer edges with the ends thereof on a radius which gives even pressure over the entire area of the shoe and allowing a greater area of brake surface for a caliper brake which gives lower shoe temperature and wear. The arc length of the shoe with each end formed on a radius provides additional shoe area radially outwardly which keeps up with the greater speed of travel at greater diameters of a disc to be braked.
The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings, showing by way of example a preferred embodiment of the inventive idea wherein like numerals refer to like parts throughout.
In the drawings forming part of this application:
FIG. 1 is a perspective view of a caliper brake embodying the invention with a disc to be braked shown in phantom-outline.
FIG. 2 is a perspective view of the arms of the brake shown as removed therefrom.
FIG. 3 is a sectional view on the line 3--3 of FIG. 1.
FIG. 4 is a sectional view on the line 4--4 of FIG. 1.
FIG. 5 is a sectional view on the line 5--5 of FIG. 3.
FIG. 6 is a view on the line 6--6 of FIG. 3.
Referring to the drawings in detail, the caliper brake A includes the base 10 having a boss 11 which has the hole 12 formed therein and in which the lower portion of the single pole 14 is press fit into the hole 12. Further provided is a first pivoting brake arm 16 which includes the flat portion 18 on the inner end of which is formed the end boss 20 having the hole 22 formed therethrough. The flat portion 18 has a side boss 24 formed thereon and through which is formed the hole 26 the axis of which is parallel to the axis of the hole 22. The outer end of the arm 18 is formed with the holes 25 and 27.
The numeral 28 designates a second pivoting brake arm that is identical to the first arm identical parts of which bear identical reference numerals accompanied by a lower-case letter a. The first arm 16 is pivotally mounted on the pole 14 with the pole extended through the friction bearing 29 mounted in the hole 26 and the arm bottoming out on the lower spacer-ring 30 positioned on top of the base boss 11. Mounted on the pole 14 on top of the boss 24 is the upper spacer ring 32, and mounted upon the pole 14 and upon the ring 32 is the boss 24a of the second pivoting arm 28. With the arms pivotally mounted in such a juxtaposed positions the same may be pivoted to and from the other as will be further described hereinafter.
The numeral 34 designates a first brake shoe including the plate portion 36 from which extends a pair of spaced flanges 38 and 40 each having a hole 41 formed therethrough which receive the pin 42. Secured to the plate portion 36 is the friction facing 44. The flange 38 is strengthened by the spaced webs 46 and 48 formed integral with the flange 38 and plate portion 36. The flange 40 is strengthened by a pair of spaced flanges 50. The shoe 34 is pivotally mounted on the boss 20 of the arm 16 by positioning the pin 42 through the holes 41 of flanges 38 and 40 and through the bearings 54 and 56 in the hole 22 of the boss 20.
Further provided is a second brake shoe 58 which is identical to shoe 34 but mounted as a left with respect to shoe 34 as a right, the identical portions bearing identical reference numerals but accompanied by a lower case letter a. Each of the pins 42 and 42a has a ring 59 connected to the top end thereof for easy insertion and removal of the pin for maintenance of the brake shoes. The arm 28 is pivotally secured upon the arm 16 by means of the lock ring 60.
Each of the shoe plate portions 36 and 36a, is arcuately formed to a radius on both inner and outer edges 62 and 64, respectively, with the ends 61 and 63 on a radius. It has been found that with the increase of arc length and area of a shoe travel there is an increase of wear due to the greater velocity at the outer extremity and that with the increase of arc in the friction linings, which coincide with the shoes, the wear throughout the lining faces is substantially even with the instant invention.
The numeral 66 designates a conventional air bladder mounted between the ends of the arms 16 and 28 on each side by means of a pair of bolts 68 and 70. The bladder is connected to an air supply line 72 which is used to expand the bladder which brings the shoes closer together while the intrinsic resilience of the bladder returns the arms together and the shoes apart.
Further provided is the central stop pin 74 anchored in and extending upwardly from the base 10 and centrally between the arms 16 and 28 and against which the guide pins 76 and 78 are adjustably positioned. The pin 76 is threadedly mounted in the arm 16 with the lock nut 80 whereby the pin 76 may be caused to extend more or less inwardly of the arm 16. The pin 78 is similarly and threadedly mounted in the arm 28 with the lock nut 82 whereby the pin 78 may be caused to extend more or less inwardly of the arm 28. With the pins 76 and 78 used in conjunction with the stop pin 74 the shoes may be oriented easily and precisely for equal braking with regard to a disc to be braked such as D.

Claims (2)

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:
1. A caliper brake comprising:
(a) a base,
(b) a single pole mounted on said base and normal thereto,
(c) first and second identical brake arms having first and second ends,
(d) each of said arms having a pole boss extending therefrom intermediate the first and second ends and adjacent an edge of the arm and spaced from the opposite edge thereof and
(e) a hole extending therethrough, said pole extended through the holes of said pole bosses with the pole boss of one arm positioned upon the pole boss of the other arm with the holes of said pole bosses in alignment thereby mounting said arms in pivotal juxtaposition,
(f) first and second brake shoes each having a friction facing thereon,
(g) each of said arms having a shoe boss on the first end thereof, and a hole extending therethrough parallelly disposed to the hole in the pole boss,
(h) each of said brake shoes having a pair of spaced flanges and
(i) each flange having a hole extending therethrough,
(j) first and second pins extending through each of the holes of said flanges of said first and second brake shoes and extending through the shoe boss of the first ends of said first and second arms thereby pivotally mounting said brake shoes on said arms,
(k) said base having a stop pin extending upwardly therefrom and parallelly disposed to said single pole,
(l) first and second guide pins mounted on said first and second arms intermediate the pole boss and the second end of said arms and extending normal thereto and contactable with said stop pin,
(m) means for adjustably positioning each of said guide pins relative to the brake arm for adjusting the pivotal position of said brake arms each to the other, and
(n) means interposed between the second ends of said brake arms for pivoting said arms upon said pole and the friction facings thereof together to grip a disc positioned between said friction facings of said shoes and away from each other for release of the disc.
2. The device of claim 1 in which said means interposed between the second ends of said brake arms for pivoting said arms includes a single air operated bladder.
US06/252,288 1979-06-29 1981-04-09 Pivoted lever caliper brake Expired - Lifetime US4374552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/252,288 US4374552A (en) 1979-06-29 1981-04-09 Pivoted lever caliper brake

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Application Number Priority Date Filing Date Title
US5341379A 1979-06-29 1979-06-29
US06/252,288 US4374552A (en) 1979-06-29 1981-04-09 Pivoted lever caliper brake

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US5341379A Continuation 1979-06-29 1979-06-29

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508200A (en) * 1982-03-10 1985-04-02 Socimi, S.P.A. High performance disc brake
US4775035A (en) * 1984-09-24 1988-10-04 Brodeur Rene H Load compensating truck mounted brake system
US4800993A (en) * 1987-06-29 1989-01-31 Itt Corporation Tandem parking brake caliper for disc brakes
US4821846A (en) * 1986-05-09 1989-04-18 J. M. Voith Gmbh Actuating device for a disk brake
US4842102A (en) * 1982-11-18 1989-06-27 Nissan Motor Co., Ltd. Disc brake for wheeled vehicle or the like
US4892121A (en) * 1988-07-14 1990-01-09 Niagara Lockport Industries Inc. Bladder type shuttle braking apparatus for looms
US5197575A (en) * 1991-10-29 1993-03-30 Mangum U Stancel Small vehicle braking system
US5813499A (en) * 1994-09-02 1998-09-29 Knorr-Bremse Systeme Fur Schienenfahrzeuge Gmbh Brake caliper unit for vehicle and especially rail vehicle disc brakes
US20020020261A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Replaceable brake mechanism for power equipment
US20030005588A1 (en) * 2001-07-03 2003-01-09 Gass Stephen F. Actuators for use in fast-acting safety systems
US20050039822A1 (en) * 2003-08-20 2005-02-24 Gass Stephen F. Woodworking machines with overmolded arbors
US20050066784A1 (en) * 2000-09-29 2005-03-31 Gass Stephen F. Safety methods for use in power equipment
US20050139056A1 (en) * 2003-12-31 2005-06-30 Gass Stephen F. Fences for table saws
US20050166736A1 (en) * 2004-01-29 2005-08-04 Gass Stephen F. Table saws with safety systems and systems to mount and index attachments
US20060180451A1 (en) * 1999-10-01 2006-08-17 Gass Stephen F Switch box for power tools with safety systems
US20060179983A1 (en) * 1999-10-01 2006-08-17 Gass Stephen F Brake mechanism for power equipment
US20060181142A1 (en) * 2004-12-30 2006-08-17 Joseph Hettinger Pneumatically controlled load compensating brake system
US20060230896A1 (en) * 1999-10-01 2006-10-19 Gass Stephen F Miter saw with improved safety system
US20060272463A1 (en) * 2000-08-14 2006-12-07 Gass Stephen F Motion detecting system for use in a safety system for power equipment
US20070101842A1 (en) * 2003-08-20 2007-05-10 Gass Stephen F Woodworking machines with overmolded arbors
US20070131071A1 (en) * 2001-07-02 2007-06-14 Gass Stephen F Discrete proximity detection system
US20100089212A1 (en) * 2000-08-14 2010-04-15 Gass Stephen F Logic control for fast-acting safety system
US7827893B2 (en) 2003-12-31 2010-11-09 Sd3, Llc Elevation mechanism for table saws
US20120211313A1 (en) * 2011-02-23 2012-08-23 Sofineco Device for electrical braking of a drive shaft
EP1712674B1 (en) * 2003-10-31 2012-09-26 Voith Patent GmbH Pressing device
US20150021126A1 (en) * 2011-12-14 2015-01-22 Nippon Steel & Sumitomo Metal Corporation Caliper brake device for railway vehicles
US20160061277A1 (en) * 2014-08-26 2016-03-03 Nabtesco Corporation Railway vehicle disc brake apparatus
US11035426B2 (en) * 2018-06-12 2021-06-15 Airbus Helicopters Caliper braking system for aircraft landing gear having a plurality of brake disk clamping zones
EP2662586B1 (en) 2012-05-11 2021-06-23 Nabtesco Corporation Disc brake pad and brake caliper device

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US3465849A (en) * 1968-03-15 1969-09-09 Moe M Bernfeld Alligator clamp disc brake
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US3993174A (en) * 1973-12-06 1976-11-23 Lynn A. Williams Engineering Company Hydraulic bicycle brake system
FR2365726A1 (en) * 1976-09-27 1978-04-21 Pont A Mousson Disc brake system for rail vehicles - incorporates brake pad release mechanism for ease of maintenance using spring-loaded pin
FR2370898A1 (en) * 1976-07-09 1978-06-09 Wagner Electric Corp DISC BRAKE EQUIPPED WITH A TRIM WEAR COMPENSATOR
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AU122604A (en) * 1905-07-04 Improvements in and relating to the electrolytic refining of lead and lead alloys
US869948A (en) * 1906-10-25 1907-11-05 Albert Richard Turner Brake for cycles, motor-cars, and the like.
US2911070A (en) * 1956-04-20 1959-11-03 American Steel Foundries Rotor brake
US3103990A (en) * 1960-11-01 1963-09-17 Thomas J Pierson Hydraulic disc brake
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US3465849A (en) * 1968-03-15 1969-09-09 Moe M Bernfeld Alligator clamp disc brake
US3993174A (en) * 1973-12-06 1976-11-23 Lynn A. Williams Engineering Company Hydraulic bicycle brake system
DE2426951A1 (en) * 1974-06-04 1976-01-02 Bergische Stahlindustrie Disc brake system for railway vehicles - has single stiffening member connected to bogie or frame
FR2370898A1 (en) * 1976-07-09 1978-06-09 Wagner Electric Corp DISC BRAKE EQUIPPED WITH A TRIM WEAR COMPENSATOR
FR2365726A1 (en) * 1976-09-27 1978-04-21 Pont A Mousson Disc brake system for rail vehicles - incorporates brake pad release mechanism for ease of maintenance using spring-loaded pin
US4193479A (en) * 1976-12-14 1980-03-18 Renault Moteurs Developpement Braking arrangement and brake, particularly for two-wheeled vehicles

Cited By (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508200A (en) * 1982-03-10 1985-04-02 Socimi, S.P.A. High performance disc brake
US4842102A (en) * 1982-11-18 1989-06-27 Nissan Motor Co., Ltd. Disc brake for wheeled vehicle or the like
US4775035A (en) * 1984-09-24 1988-10-04 Brodeur Rene H Load compensating truck mounted brake system
US4821846A (en) * 1986-05-09 1989-04-18 J. M. Voith Gmbh Actuating device for a disk brake
US4800993A (en) * 1987-06-29 1989-01-31 Itt Corporation Tandem parking brake caliper for disc brakes
US4892121A (en) * 1988-07-14 1990-01-09 Niagara Lockport Industries Inc. Bladder type shuttle braking apparatus for looms
US5197575A (en) * 1991-10-29 1993-03-30 Mangum U Stancel Small vehicle braking system
US5813499A (en) * 1994-09-02 1998-09-29 Knorr-Bremse Systeme Fur Schienenfahrzeuge Gmbh Brake caliper unit for vehicle and especially rail vehicle disc brakes
US20060179983A1 (en) * 1999-10-01 2006-08-17 Gass Stephen F Brake mechanism for power equipment
US20060180451A1 (en) * 1999-10-01 2006-08-17 Gass Stephen F Switch box for power tools with safety systems
US9925683B2 (en) 1999-10-01 2018-03-27 Sawstop Holding Llc Table saws
US9522476B2 (en) 1999-10-01 2016-12-20 Sd3, Llc Power equipment with detection and reaction systems
US8402869B2 (en) 1999-10-01 2013-03-26 Sd3, Llc Brake mechanism for power equipment
US8408106B2 (en) 1999-10-01 2013-04-02 Sd3, Llc Method of operating power equipment with detection and reaction systems
US9969014B2 (en) 1999-10-01 2018-05-15 Sawstop Holding Llc Power equipment with detection and reaction systems
US10335972B2 (en) 1999-10-01 2019-07-02 Sawstop Holding Llc Table Saws
US7788999B2 (en) * 1999-10-01 2010-09-07 Sd3, Llc Brake mechanism for power equipment
US20060230896A1 (en) * 1999-10-01 2006-10-19 Gass Stephen F Miter saw with improved safety system
US8196499B2 (en) 1999-10-01 2012-06-12 Sd3, Llc Power equipment with detection and reaction systems
US20070028733A1 (en) * 1999-10-01 2007-02-08 Gass Stephen F Safety methods for use in power equipment
US20110061768A1 (en) * 1999-10-01 2011-03-17 Gass Stephen F Brake mechanism for power equipment
US7895927B2 (en) 1999-10-01 2011-03-01 Sd3, Llc Power equipment with detection and reaction systems
US20110023673A1 (en) * 1999-10-01 2011-02-03 Gass Stephen F Power equipment with detection and reaction systems
US20100236663A1 (en) * 1999-10-01 2010-09-23 Gass Stephen F Power equipment with detection and reaction systems
US8522655B2 (en) 2000-08-14 2013-09-03 Sd3, Llc Logic control for fast-acting safety system
US8191450B2 (en) 2000-08-14 2012-06-05 Sd3, Llc Power equipment with detection and reaction systems
US20100089212A1 (en) * 2000-08-14 2010-04-15 Gass Stephen F Logic control for fast-acting safety system
US20020020261A1 (en) * 2000-08-14 2002-02-21 Gass Stephen F. Replaceable brake mechanism for power equipment
US8151675B2 (en) 2000-08-14 2012-04-10 Sd3, Llc Logic control for fast-acting safety system
US9038515B2 (en) 2000-08-14 2015-05-26 Sd3, Llc Logic control for fast-acting safety system
US20110023670A1 (en) * 2000-08-14 2011-02-03 Gass Stephen F Power equipment with detection and reaction systems
US20060272463A1 (en) * 2000-08-14 2006-12-07 Gass Stephen F Motion detecting system for use in a safety system for power equipment
US7921754B2 (en) 2000-08-14 2011-04-12 Sd3, Llc Logic control for fast-acting safety system
US20050066784A1 (en) * 2000-09-29 2005-03-31 Gass Stephen F. Safety methods for use in power equipment
US8061245B2 (en) 2000-09-29 2011-11-22 Sd3, Llc Safety methods for use in power equipment
US20070131071A1 (en) * 2001-07-02 2007-06-14 Gass Stephen F Discrete proximity detection system
US20030005588A1 (en) * 2001-07-03 2003-01-09 Gass Stephen F. Actuators for use in fast-acting safety systems
US7712403B2 (en) 2001-07-03 2010-05-11 Sd3, Llc Actuators for use in fast-acting safety systems
US20070101842A1 (en) * 2003-08-20 2007-05-10 Gass Stephen F Woodworking machines with overmolded arbors
US20050039822A1 (en) * 2003-08-20 2005-02-24 Gass Stephen F. Woodworking machines with overmolded arbors
US7836804B2 (en) 2003-08-20 2010-11-23 Sd3, Llc Woodworking machines with overmolded arbors
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